Auger decay, spin exchange, and their connection to Bose-Einstein condensation of excitons in Cu2O - Archive ouverte HAL Access content directly
Journal Articles Physical Review B: Condensed Matter and Materials Physics (1998-2015) Year : 2000

Auger decay, spin exchange, and their connection to Bose-Einstein condensation of excitons in Cu2O

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Abstract

In view of the recent experiments of O'Hara et al. [Phys. Rev. B 60, 10 565 (1999) and Phys. Rev. B 60, 10 872 (1999)] on excitons in Cu2O, we examine the interconversion between the angular-momentum triplet-state excitons and the angular-momentum singlet-state excitons by a spin-exchange process that has been overlooked in the past. We estimate the rate of this particle-conserving mechanism and find a substantially higher value than the rate of the Auger process considered so far. Based on this idea, we give a possible explanation of the recent experimental observations, and make certain predictions, with the most important being that the singlet-state excitons in Cu2O is a very serious candidate for exhibiting the phenomenon of Bose-Einstein condensation.

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hal-00465589 , version 1 (19-03-2010)

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G.M. Kavoulakis, André Mysyrowicz. Auger decay, spin exchange, and their connection to Bose-Einstein condensation of excitons in Cu2O. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2000, 61 (24), pp.16619. ⟨10.1103/PhysRevB.61.16619⟩. ⟨hal-00465589⟩
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